Diana Princess of Wales takes the salute at the Sovereigns Parade at the Royal Military Academy on April 10, 1987 in Sandhurst, Berkshire, England.The Princess wore a military style outfit designed by Catherine Walker, with a hat designed by Graham Smith at Kangol. less

Diana Princess of Wales takes the salute at the Sovereigns Parade at the Royal Military Academy on April 10, 1987 in Sandhurst, Berkshire, England.The Princess wore a military style outfit designed by Catherine ... more

Princess Diana, Princess of Wales and Prince Charles, Prince of Wales attend a dinner held by the Mayor of Florence during a tour of Italy in April, 1985. Diana wore her first Azagury dress, it had blue stars embroidered on a long fitted black bodice and a bright blue organza skirt tied on the hip with a bow. ) less

Princess Diana, Princess of Wales and Prince Charles, Prince of Wales attend a dinner held by the Mayor of Florence during a tour of Italy in April, 1985. Diana wore her first Azagury dress, it had blue stars ... more

Princess Diana (1961 - 1997) arriving at the Serpentine Gallery, London, in a gown by Christina Stambolian, June 1994. The dress is seen as a statement piece since Prince Charles had earlier than day publically disclosed his infidelity with Camilla Parker-Bowles. less

Princess Diana (1961 - 1997) arriving at the Serpentine Gallery, London, in a gown by Christina Stambolian, June 1994. The dress is seen as a statement piece since Prince Charles had earlier than day publically ... more

Diana, Princess of Wales as Patron of the English National Ballet, attends their Royal Gala performance of 'Swan Lake' at London's Royal Albert Hall, Walking behind her is Lady-in-waiting Anne Beckwith-Smith, Diana's evening shift dress is by designer Jacques Azagury and her necklace is loaned by Garrard the jewellers less

Diana, Princess of Wales as Patron of the English National Ballet, attends their Royal Gala performance of 'Swan Lake' at London's Royal Albert Hall, Walking behind her is Lady-in-waiting Anne Beckwith-Smith, ... more

Photo: Tim Graham, Tim Graham/Getty Images

Diana, Princess of Wales as Patron of the English National Ballet,... Photo-5399954.73191 - GreenwichTime

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Designer Jacques Azagury with his recreations and "Dianesque" styled gowns for the film "Diana."

Designer Jacques Azagury with his recreations and "Dianesque" styled gowns for the film "Diana."